<template>
  <view class="cart-container" v-if="cart.length !== 0">
    <!-- 收货地址组件 -->
    <my-address></my-address>
    <!-- 购物车商品列表的标题区域 -->
    <view class="cart-title">
      <!-- 左侧的图标 -->
      <uni-icons type="shop" size="18"></uni-icons>
      <!-- 描述文本 -->
      <text class="cart-title-text">购物车</text>
    </view>
    <!-- 商品列表区域 -->
    <uni-swipe-action>
      <block v-for="(goods,i) in cart" :key="i">
      <uni-swipe-action-item :right-options="options" @click="swipeActionClickHandler(goods)">
        <my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler" @num-change="numberChangeHandler"></my-goods>
      </uni-swipe-action-item>
      </block>
    </uni-swipe-action>
    <!-- 使用自定义的结算组件 -->
    <my-settle></my-settle>
  </view>
  <!-- 空白购物车区域 -->
  <view class="empty-cart" v-else>
    <image src="/static/cart_empty@2x.png" class="empty-img"></image>
    <text class="tip-text">空空如也</text>
  </view>
</template>

<script>
 import badgeMix from '@/mixins/tabbar-badge.js'
 import { mapState, mapMutations } from 'vuex'
  export default {
    mixins: [badgeMix],
    computed: {
      //将 m_cart 模块中的 cart 数组映射到当前页面中使用
      ...mapState('m_cart', ['cart'])
    },
    data() {
      return {
        options: [{
          text: '删除',
          style: {
            backgroundColor: '#C00000'  //按钮背景颜色
          }
        }]
      };
    },
    methods: {
      ...mapMutations('m_cart', ['updateGoodsState','updateGoodsCount','removeGoodsById']),
      //商品的勾选状态发生了变化
      radioChangeHandler(e) {
        this.updateGoodsState(e)
      },
      //商品的数量发生了变化
      numberChangeHandler(e) {
        this.updateGoodsCount(e)
      },
      swipeActionClickHandler(goods) {
        this.removeGoodsById(goods.goods_id)
      }
    }
  }
</script>

<style lang="scss">
   .cart-title {
     height: 40px;;
     display: flex;
     align-items: center;
     padding-left: 5px;
     border-bottom: 1px soliid #efefef;
     .cart-title-text {
       font-size: 14px;
       margin-left: 10px;
       
     }
   }
   .cart-container {
     padding-bottom: 50px;
   }
   .empty-cart {
     display: flex;
     flex-direction: column;
     align-items: center;
     padding-top: 150px;
     
     .empty-img {
       width: 90px;
       height: 90px;
     }
     .tip-text {
       font-size: 12px;
       color: gray;
       margin-top: 15px;
     }
   }
</style>
